a 21

How many red blood cells normally fit across the diameter of a capillary?

1

Which is NOT a vessel coming from the arch of the aorta? A) branchiocephalic trunk B) left common carotid C) left subclavian a. D) right subclavian a

D) right subclavian a

Who discovered the route of the blood vessels within the human body?

Harvey

What is the vessel that divides into the common iliac aa?

abdominal aorta

The connection of the radial a. with the ulnar a. is an example of a/n _______________. A) communication B) anastomoses C) collateral circulation D) All of the above are correct. E) All of the above are NOT correct

all of the above are correct

These vessels contain large amounts of elastic tissue within the tunica media. What are they called?

arteries

What are the vessels called that carry blood away from the heart?

arteries

What are the vessels called that are major resistors in the circulatory system and contain smooth muscles within their walls

arterioles

What are the vessels called that are the functional unit of the circulatory system because all exchange takes place here?

capillaries

Which is NOT a vessel going to the upper limbs? A) cephalic B) brachial C) subclavian D) axillary

cephalic

The two veins that drain the superficial upper limb are the _______________ and __________________.

cephalic - basilic

The tunica interna lines the inside of the vessels and is made of a simple squamous epithelium called the ________________________.

endothelium

The major artery of the thigh, is a continuation of the external iliac artery, called the ________________.

femoral a

Which branch of the abdominal aorta supplies the distal end of the large intestine?

inferior mesenteric a.

What are the vessels called that connect the vertebral and carotid systems at the base of the brain?

posterior communication aa

Which is NOT a branch of the celiac trunk? A) renal a. B) splenic a. C) left gastric a. D) common hepatic a.

renal a

Which of the following is NOT an unpaired artery of the abdominal mesenteries? A) inferior mesenteric a. B) renal a. C) superior mesenteric a. D) celiac trunk

renal a

The hepatic portal vein receives blood from all of the following EXCEPT the ___________________ A) the splenic vein. B) the superior mesenteric vein. C) the pancreatic vein. D) the hepatic veins.

the hepatic veins.

Most blood from the brain flows down the internal jugular veins and then into the __________________

the subclavian veins.

Which layer of the vessel wall facilitates vasoconstriction and vasodilation?

the tunica media

Which of the following is associated with veins but not arteries?

valves

What are the small blood vessels called that provide blood to the outer half of the tunica externa (adventitia) of larger arteries and veins?

vasa vasorum

The widening of a vessel is called _______________.

vasodilation

At any one moment most of the bodies blood volume is in the _______________________.

veins

What are the vessels called that are thin-walled and expand easily?

veins